Hi, On Wed 06 Nov 19, 16:23, Patrik Jakobsson wrote: > On Wed, Nov 6, 2019 at 10:44 AM Paul Kocialkowski > <paul.kocialkowski@xxxxxxxxxxx> wrote: > > > > This adds a missing call to drm_crtc_vblank_on to the common DPMS helper > > (used by poulsbo and cedartrail), which is called in the CRTC enable path. > > > > With that call, it becomes possible to enable vblank when needed. > > It is already balanced by a drm_crtc_vblank_off call in the helper. > > > > Other platforms (oaktrail and medfield) use a dedicated DPMS helper that > > does not have the proper vblank on/off hooks. They are not added in this > > commit due to lack of hardware to test it with. > > > > Signed-off-by: Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx> > > Don't think we ever found a need for having vblanks enabled... until > now. I'll have a look if something can be done for Oaktrail since I > have hw. Neat, thanks! IIRC the DPMS paths that don't use gma_crtc_dpms also lack the proper drm_crtc_vblank_on/off calls so that's probably something to start with :) Thanks for the review on these patches. I may have more fixes coming up. Cheers, Paul > Reviewed-by: Patrik Jakobsson <patrik.r.jakobsson@xxxxxxxxx> > > > --- > > drivers/gpu/drm/gma500/gma_display.c | 2 ++ > > 1 file changed, 2 insertions(+) > > > > diff --git a/drivers/gpu/drm/gma500/gma_display.c b/drivers/gpu/drm/gma500/gma_display.c > > index e20ccb5d10fd..bc07ae2a9a1d 100644 > > --- a/drivers/gpu/drm/gma500/gma_display.c > > +++ b/drivers/gpu/drm/gma500/gma_display.c > > @@ -255,6 +255,8 @@ void gma_crtc_dpms(struct drm_crtc *crtc, int mode) > > /* Give the overlay scaler a chance to enable > > * if it's on this pipe */ > > /* psb_intel_crtc_dpms_video(crtc, true); TODO */ > > + > > + drm_crtc_vblank_on(crtc); > > break; > > case DRM_MODE_DPMS_OFF: > > if (!gma_crtc->active) > > -- > > 2.23.0 > > -- Paul Kocialkowski, Bootlin Embedded Linux and kernel engineering https://bootlin.com
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